Furnace-grate.



PATENTED JUNE 9, 1908. U. E. BIBB.

FURNACE GRATE. APPLICATION FILED MAR.11, 1907.

2 SHEETS-SHEET 1.

r14: NORRIS PETERS cm, WASHINGTON, o. c.

' O. E. BIBB. FURNACE GRATE.

APPLICATION FILED MAR.11, 1907- PATENTED JUNE 9, 1908.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFF CHARLES E. BIBB, OF COLORADO SPRINGS, COLORADO, ASSIGNOR OF THREE-FIFTHS TO DAVID H. RICE, OF COLORADO SPRINGS, COLORADO.

FURNACE-GRATE.

I Specification of Letters Patent.

Patented June 9, 1908.

Application filed. March 11, 1907. Serial No. 361,840.

T all whom it may concern:

Be it known that I, CHARLES E. BIBB, a citizen of the United States, residing at Colorado Springs, in the county of El iaso and State of Colorado, have invented certain new and useful Improvements in Furnace-Grates and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in furnace grates, my object being to provide a grate adapted to be cooled by the passage of water through the bars thereof, the said bars being mounted to be rotated either individually or collectively as may be desired.

The invention will now be described in detail reference being made to the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing, Figure 1 is a top plan view of a grate equipped with my improvements, parts being shown in section. Fig. 2 is a side view of the grate shown artly in section. Fig. 3 is an end view il ustrating the construction for shaking the grate bars. Fig. 4 is a sectional view of a grate bar illustrating the pipes through which the cooling water is passed. Fig. 5 is a detail view of one of the plates for locking the bars against independent rotation. Fig; 6 is an end view of the two water pipe constructions located within the individual hollow grate bars. Fig. 7 is an enlarged side view of the forward end of the grate bar illustrating the shaking means. Fig. 8 is an end view of the same. Fig. 9 is a view similar to Fig. 4 showing a modified form of construction. Fig. 10 is a section taken on the line 1010 Fig. 9.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate each of a series of hollow grate bars, the adjacent bars being provided with detachable grate sections 6 connected to the bars exteriorly by cap screws 7 applied from below. These bars 5 are journaled in suitable sup orts 8 and 9 located in front and rear. fit in each hollow grate bar is located a conduit composed of two parallel members 10 connected at their rear extremities as shown at 12.

- As shown in the drawing the conduits located within the bars are connected by branch pipes 13 located in front. By means of this construction the water entering the grate through an inlet pipe 1 1 may escape there from through an outlet pi e 15 thus maintaining a constant circu ation of water through the hollow bars, the water, however, not coming in direct contact with the bars but being separated therefrom as explained. It will be understood that there is an air space within the hollow bars, since the water pipes do not close the space therein.

To the forward extremity of each hollow grate bar is secured an upright member 16 having a bifurcated portion 16. Between the arms of this bifurcated part is bolted a device 17 provided with a socket 17 adapted to receive a shaker arm (not shown). To the upper extremity of each upright member 16 is secured a cap screw 18 which projects forwardly from the part 16, leaving a space for the reception of a plate 19 having recesses 20 open at the bottom and adapted to engage the cap screws 18 of two adjacent parts 16.

The manner of connecting the uprights of the various grate bars, is illustrated in Fig. 3 in which I will designate two adjacent plates 19 as A and B for convenience of description, the plate A being one of the outside plates and the plate B one of the inside plates. In connecting these plates with the grate bar apparatus, the plate A is dropped over the cap screws 18 of the outermost bar 16 and the adjacent inner bar, the slots 20 of the plate engaging the said screws. The plate B is then connected with the cap screw 18 already engaged by one extremity of the plate A and a separate cap screw 18 of another upright. In this way each cap screw except the outermost on each side of the grate, is engaged by two plates 19, the slots 20 which are open at the bottom, being engaged by the said screws. This connection having been made it is evident that if a shaking arm (not shown) be inserted in a socket of any member 17 all of the grate bars may be simultaneously shaken. Now if it is desired to shake the grate bars individually or any number less than the whole, the connecting plates 19 may be suitably arranged to accomplish the purpose. For instance if it is desired to shake any grate bar without disturbing the other grate bars, the plate or plates 19 are simply detached from the cap screw 18 corresponding with the bar to be shaken, after which the bar is free to be moved independently of the other bars. This is an essential feature in keeping a level bed of fuel on the grate.

The two members 10 of each conduit within any hollow bar, are connected by a semicircular disk 21 engaging the pipe members 10 below and a bridge piece. 22 engaging the same members from above, the parts 21 and 22 being connected by a cap screw 23. In this way the members 10 are securely held together and properly supported within each hollow bar. The semi-circular piece 21, is curved to conform to the inner curvature of the grate bar.

Instead of employing two distinct conduit members 10, a single conduit 24 (see Fig. 10) may be employed, the same being divided into two compartments by a partition 25 extending from the inner extremity of the conduit and terminating near the rear extremity thereof, sufficient space, however, being left to allow the water to pass from one compartment to the other. In this event the water enters the forward extremity of one of the compartments by an inlet 26 and escapes from the forward extremity of the other compartment by an outlet 27. In this way the water would circulate through all the members of the grate'in the same manner as where two distinct and separate conduit members are employed. I

From the foregoing description the use and operation of my improved grate will be readily understood. Assuming that the parts of the said construction are assembled as shown in Fig. 1 of the drawing, the cooling water is introduced through the conduits within the hollow bars, through an inlet 14 and after passing through the conduits of all of the said bars, it escapes through an outlet 15. hen it is desired to shake all of the grate bars simultaneously, the shaking device is inserted in the socket member 17, and the upright parts 16 moved back and forth, thus imparting a shaking movement to all of the grate bars simultaneously. Now if it is desired to shake any individual bar, the connecting plates 1.9 are detached from the upright corresponding with that bar, after which the last named bar may be shaken separately and independently of the other bars.

An important feature of my improved grate construction, consists in the fact that the detachable grate bar sections are provided with intermeshing fingers which facilitates the breaking of all clinkers. This is also important, since when one grate bar is shaken independently of the others, it cleans the adjacent fingers of the opposite grate bars of ash and clinkers.

In the form of construction shown in Fig. 9, I will designate the semi-circular conduit support as 21 and the bridge piece as 22*. In this case two screws designated C are employed to connect the bridge piece with the part 21.

Having thus described my invention, what I claim is;

1. A hollow grate bar provided with a conduit for passing water through the bar, the said conduit being composed of two parallel members communicating at their rear extremities whereby the cooling water is compelled to flow the entire length of the bar in both directions, the said conduit being distinct and separate from the grate bar, and the latter being mounted to rotate with respect to the conduit, substantially as described.

2. The combination with a hollow grate bar, of a conduit located therein composed of two parallel members communicating with each other at the rear, suitable means for rigidly connecting the conduit members within the hollow bar, comprising a semi-circular disk engaging the grate bar on the inside and forming a support for the pipes, a bridge piece engaging the pipes above, and a cap screw connecting the semi-circular part to the bridge piece, substantially as described.

3. The combination with a hollow grate bar, of a conduit located therein, and means for supporting the conduit within the hollow bar comprising a semi-circular disk engaging the bar on the inside and forming a support for the conduit, a bridge piece engaging the conduit from above and cap screws connecting the bridge piece with the semi-circular part.

4. The combination with a hollow grate bar, of a conduit located therein, means for supporting the conduit within the hollow bar, comprising a semi-circular disk engaging the bar on the inside and forming a support for the conduit, and a bridge piece engaging the conduit from above and connected with the semi-circular part, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES E. BIBB. 

